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Based on the electromagnetic induction theory, the process of electromagnetic tomography is described as follows, exciting magnetic field is produced by alternating current which is injected into electromagnetic sensor array at the boundary of object field, and the induced magnetic field, which is affected by exciting magnetic field, is aroused in the electrical or magnetic conductive objects. The...
Electromagnetic tomography has potential value in process measurement. The frontier of electromagnetic tomography system is the sensor array. Owing to the excited signal acting on the sensor array directly, the excited strategy and the frequency and amplitude of the signal affect the quality of the information that the detected coil acquired from the object space. Furthermore, it would affect the...
For improving the measuring accuracy and stability of weak magnetic signal of sensor output, based on principles of the proton magnetometer, signal detecting conditioning circuit used analog circuits technology is designed. The feasibility of conditioning circuit is analyzed, the measured data is obtained. In current conditions, The results showed that the signal to noise ratio achieved 30dB.It can...
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